[BUGFIX] scala-http4s fix bad encoding of form-urlencoded body in baseClient.mustache

[KristianAN]

The code for setting the form body parameters were wrong,

e.g. the key value pair (id, 12345) would be encoded as id=%28id%2C12345%29

This commit adds a fix to the base client to correctly setting formBody values the previous pair will now be encoded as

id=12345

@clasnake (2017/07), @shijinkui (2018/01), @ramzimaalej (2018/03), @chameleon82 (2020/03), @Bouillie (2020/04) @Fish86 (2023/06)

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[wing328]

thanks for the PR

did you test this fix in your environment to confirm it addresses the issue mentioned?

[KristianAN]

Yes, I have tested this in a generated client